Crystal Mining Excavation Science Kit (mineral rock geology scientist digging kit for the aspiring geologist). Crystal Mining Excavation Science Kit. Excavate your very own natural crystals. Add them to your rock collection and learn some fun characteristics of different crystal. Contains 1 plaster block with 8 natural crystals buried inside, 1 specially designed digging tool, 1 brush, 1 magnifier, 1 set display case with cover and base card, 1 pouch bag and detailed instructions with fun facts. Great gift idea, presented in gift box as pictured.